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R. P. PLACE.

GRINDING WHEEL DRESSER. APPLICATION FILED FEB. 1h. 1m.

1,3475 1 9. Patented y 27, 1920.v

[NVEN TOE.

$44-7) ATT PNEYG UNITED STATES PATENTOFFICE.

ROLAND r. PLACE, OF DETROIT, MICHIGAN, ASSIGNOR To. THE H-P co'MPAnY, or

" DETROIT, MICHIGAN, CORPORATION OF MICHIGAN.

To all whom it may concern:

Be it known that 1,.RLAND P. PLACE, a CltlZBH Of theUnited States, and residing at I Detroit, in the county of WVayne and State of'Michigan, have invented a new and Improveu (rrmdmg-Vheel Dresser, of whlch the following is a specification.

' The present invention has reference primarily to the type of grinding wheel dresser disclosed and claimed in United States Letters Patent. No. 1,276,366, granted August completely housed than heretofore, thus excluding chips and emery dust from the Wearing surfaces. Again, the invention provides for a free feeding of oil tor-the bearings through the centrifugal action of the tool, as Well as for a pocketing of the oil in the space surrounding the bearings, whereby ei'licient lubrication is secured without Waste. Y I

Anotherobject is to provide an inexpensive and .eiiieient construction wherein the ball bearings may be adjusted longitudinally of the axis of the tool to insure proper initial adjustment and to take up wear.

The invention also. provides for holding the longitudinally adjustable shaft from rotation without the necessityuof resorting ,to-

the relatively expensive keys and the like ordinarily employed. for. such purposes.v

to which it may be worn: away.

To-the end of attaining these and other objects the natureoi WlllCh will appear,

later, the invention consists in a cutter or the like having housed in. its end portions anti-friction bearings protected and retained. by disks or the like, the outer or edge sur-r faces of which form oil-tight joints with the- GRIN'DING-WHEEL DRESSER.

Specification of Letters Patent. Patented l 27"1920 Applicationfiled February 10, 1919. Serial No. 276,055.

tecting anyappreciable pressure thereon, thereby establishing an additional seal for the ex- Again, the invention consists in a rigid cutter made up of toothed: disks'so positioned in reference. to each other as to form between adjacent teeth of. any particular disk are of substantially the same width cir-' cumferentially of the disk throughout their depth. I I

The invention also consists in various other details of construction and relative arrangements of. parts shown, described and claimed In the drawings, Figure 1 is a perspective View showing a preferred embodiment of disks or element, without exerting v helices, and so constructed that the notches this nature wherein the bearings are more the invention. Fig. 2 is a fragmentary side elevation corresponding thereto. F 3 is a central vertical section through .the axis of the cutter. i f V 1 indicates any suitable handle that may 'be either separate from or integral with a head, the latter of which preferably includes two spaced arms or end walls,2-3 joined at thetop and rear by the wall l, thereby j forming a chamber in which the working .The invention further provides a cutter capable of performing a substantially uniform finishing action regardless of the depth cutter'may revolve and from which the chips are prevented from-flying. These arms are Ipierced respectively ate and 6to receive the ma in'portion 8 and thela'rger' cylindrical end portion 9 of a cutter shaft that also preferably comprises the head 10 one side of which is cut away at 11 to engage a lug 12 on the wall 2 which serves to prevent the shaft from turning about its own axis. The nuts:13 14 constitutemeans for both adusting the shaft along its own axis and for locking it in proper position. It will be ob served that there is some clearance between the inner face of the head 10 and the wall 2, also that the shaft has a shoulder 15, and that the wall 3 is provided with a boss 16.

In the particular construction shown, the cutter comprises a tubular member or spool 18 on which are mounted a series of cutter disks 19 that are so held in respect to each other as to cause their teeth to form helical linesthis may be conveniently accomthe flanges 22 down into the cups under heavy pressure.

Positioned in each housing is a ball bearmg which may be of well known construction andwhich, in the embodiment inproject somewhat beyond the walls dicated, includes the outer race 24:, the inner race 25, the balls 26 and the ball-holder or retainer 27. It will be observed that the spool is spaced somewhat from the shaft to afford a chamber 28, to which lubricating oil may be admitted through the passage '29 and oiling device 30, and that oilin this chamber will naturally be fed out into the bearings by centrifugal action.

Were no means provi. led to prevent it, it is evident that the oil would be thrown from the bearings as the tool continued to revolve, and I therefore press into the ends of the housings 2i) thin walls 32 which fit tightly so as to form oil-tight joints with the inner surfaces of the housings, and to constitute, in effect, permanent end walls therefor. Pockets are thus formed at each end wherein the bearings run in oil, and the construction moreover of itself quite efiiectually prevents chips and emery dust from working into the bearings.

It will be noticed that the housings so and ' that the inner edges of the latter are spaced be readily secured.

somewhat from the shaft: this space is utilized for the reception of collars 2-333-434- that project through the walls 32 and on gage the inner race of the corresponding bea ing. The collar is adapted to be engaged by the shoulder 15 on the shaft, and the collar 3% is adapted to bear on the boss 16, consequently when the nuts 13-l l are tightened to draw the shaft endwise, within the limits of the clea ance under the head l(), the inner races are forced toward each other to seat the balls properly in the races, and accurate adjustment may at all times The collars 33-34:, which do not ordinarily rotate, conform to the shaft and afford a further seal against the admission of dirt, although they are held very slightly away from the walls 32 by contact with the inner races and thus do not interfere with free rotation of the cutter.

By forming the notches 85 in the cutter ailferent from that snown; in fact, rotating elements such as wheels, pulleys, and the like, may generally be advantageously mountedv in this manner. I do not,.therefo re, wish to be limitedcxcept as indicated by the subjoined claims.

I claim: V 2

1. In combination, a shaft, anelcment rotat-able thereon and having a cup-shaped recess in one end, an anti-friction. bearing in said recess, saidbearmg lncludmg an outer race, an inner race, and interposedrolling members, an end wall for said recess beyond the bearing, said wall being rigid with the rotatable element and sealing a channel in which the rolling members run, and a washer outside of said end wall of substantially the same diameter as said wall and pressing on'the inner race to adjust the hearing and to exclude dirt.

2. In cmnbination, a divided support comprising end fur-cations, a shaft passing through the furcations of the support and having a main portion. of relatively small diameter and an end portion of relatively large diameter, the portion of large diameter being of a length slightly greater than the width of the corresponding fureation, the shaft also having a non-circular head coacting with the supportto prevent rotation, means for drawing the shaft longitudinally of its axis, and a rotatable element carried by the shaft and having bean ings adapted to be adjusted by the longitudinal movement of the shaft.

3. In combination, a longitudinally adjustable shaft, an element rotatable about the shaft and having a recess in one end, a ball bearing housed in the recess and including an outer race, balls, and an inner race, a thin end wall pressed into the recess and against the outer race and forming a tight joint, said wall approximately covering the opening between the two races, and means engaging the inner race toforce it axially of the outer race as the shaft is shifted longitudinally.

ROLAND P. PLACE. 

